package com.badlogic.androidgames.framework.impl;

import java.util.ArrayList;
import java.util.List;

import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

import com.badlogic.androidgames.framework.Input;
import com.badlogic.androidgames.framework.Pool;
import com.badlogic.androidgames.framework.Input.TouchEvent;
import com.badlogic.androidgames.framework.Pool.PoolObjectFactory;

public class MultiTouchHandler implements TouchHandler {

	int[] touchX = new int[20];
	int[] touchY = new int[20];
	Pool<Input.TouchEvent> touchEventPool;
	List<Input.TouchEvent> touchEventsBuffer = new ArrayList<Input.TouchEvent>();
	List<Input.TouchEvent> touchEvents = new ArrayList<Input.TouchEvent>();
	boolean[] touched = new boolean[20];
	
	/*use these to cope with different screen resolutions*/
	float scaleX;
	float scaleY;
	
	
	public MultiTouchHandler(View view, float scaleX, float scaleY) {
		
		PoolObjectFactory<Input.TouchEvent> factory = new PoolObjectFactory<Input.TouchEvent>() {
			@Override
			public Input.TouchEvent createObject() {
				return new Input.TouchEvent();
			}
		};
		touchEventPool = new Pool<Input.TouchEvent>(factory,100);
		view.setOnTouchListener(this);
		this.scaleX = scaleX;
		this.scaleY = scaleY;
	}

	@Override
	public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub	
		synchronized (this) {
			int action = event.getAction() & MotionEvent.ACTION_MASK;
			int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
			Log.d("Multitouch", "pointerIndex " + "" + pointerIndex);
			int pointerId = event.getPointerId(pointerIndex);
			TouchEvent touchEvent;
			switch (action) {
				case MotionEvent.ACTION_DOWN:
				case MotionEvent.ACTION_POINTER_DOWN:
					touchEvent = touchEventPool.newObject();
					touchEvent.type = TouchEvent.TOUCH_DOWN;	
					touched[pointerId] = true;
					touchEvent.pointer = pointerId;
					Log.d("MultiTouch" , "X e Y " + event.getX(pointerIndex) + " " + event.getY(pointerIndex));
					touchEvent.x = touchX[pointerId] = (int) (event.getX(pointerIndex) * scaleX);
					touchEvent.y = touchY[pointerId] = (int) (event.getY(pointerIndex) * scaleY);
					Log.d("MultiTouch" , "X e Y " + touchEvent.x + " " + touchEvent.y);
					touchEventsBuffer.add(touchEvent);
					break;
				case MotionEvent.ACTION_UP:
				case MotionEvent.ACTION_POINTER_UP:
				case MotionEvent.ACTION_CANCEL:
					touchEvent = touchEventPool.newObject();
					touchEvent.type = TouchEvent.TOUCH_UP;	
					touched[pointerId] = false;
					touchEvent.pointer = pointerId;
					Log.d("MultiTouch" , "X e Y " + event.getX(pointerIndex) + " " + event.getY(pointerIndex));
					touchEvent.x = touchX[pointerId] = (int) (event.getX(pointerIndex) * scaleX);
					touchEvent.y = touchY[pointerId] = (int) (event.getY(pointerIndex) * scaleY);
					Log.d("MultiTouch" , "X e Y " + touchEvent.x + " " + touchEvent.y);
					touchEventsBuffer.add(touchEvent);
					break;
				case MotionEvent.ACTION_MOVE:
					int pointerCount = event.getPointerCount();
					for (int i = 0; i < pointerCount; i++) {
						pointerIndex = i;
						pointerId = event.getPointerId(pointerIndex);
						touchEvent = touchEventPool.newObject();
						touchEvent.type = TouchEvent.TOUCH_DRAGGED;
						touchEvent.pointer = pointerId;
						touchEvent.x = touchX[pointerId] = (int) (event.getX(pointerIndex) * scaleX);
						touchEvent.y = touchY[pointerId] = (int) (event.getY(pointerIndex) * scaleY);
						touchEventsBuffer.add(touchEvent);
					}
					break;
			}	
			return true;
		}	
	}

	@Override
	public boolean isTouchDown(int pointer) {
		// TODO Auto-generated method stub
		synchronized (this) {
			if (pointer < 0 || pointer >= 20)
			return false;
			else
			return touched[pointer];
		}
	}

	@Override
	public int getTouchX(int pointer) {
		// TODO Auto-generated method stub
		synchronized (this) {
			if (pointer < 0 || pointer >= 20)
			return 0;
			else
			return touchX[pointer];
		}
	}

	@Override
	public int getTouchY(int pointer) {
		// TODO Auto-generated method stub
		synchronized (this) {
			if (pointer < 0 || pointer >= 20)
			return 0;
			else
			return touchY[pointer];
		}
	}

	@Override
	public List<TouchEvent> getTouchEvents() {
		// TODO Auto-generated method stub
		synchronized (this) {
			int len = touchEvents.size();
			for (int i = 0; i < len; i++)
			touchEventPool.free(touchEvents.get(i));
			touchEvents.clear();
			touchEvents.addAll(touchEventsBuffer);
			touchEventsBuffer.clear();
			return touchEvents;
		}
	}

}
